Amid worsening air quality, Delhi chief minister Atishi on Thursday announced that primary schools in Delhi will hold online classes until further directions are given. School students at Delhi’s India Gate on Wednesday.(ANI) “Due to rising pollution levels, all primary schools in Delhi will be shifting to online classes, until further directions,” the chief minister said in a post on X. The announcement comes hours after the Delhi government announced that the third stage of the Graded Response Action Plan (GRAP), meant for reducing air pollution, will come into effect on Friday amid worsening air quality in the city. The GRAP Stage III curbs include a ban on construction and demolition activities and plying of BS-lll petrol and BS-IV diesel light motor vehicles. GRAP for the National Capital Region (NCR) is classified under four different stages of adverse air quality in Delhi: Stage I — ‘poor’ (AQI 201-300); Stage II — ‘very poor’ (AQI 301-400); Stage III — ‘severe’ (AQI 401-450); and Stage IV — ‘severe plus’ (AQI >450). The air quality in the capital …